I designed our product by applying AD5111 (10K, Up/Down).
It worked normally once or twice, but it is currently fixed at A-W 45 ohm and W-B 9.8K ohm, and does not respond to any commands.
Sometimes when power is applied again, it becomes A-W 9.8K ohm, W-B 39 ohm.
The strange thing is that the resistance of A-B is measured around 9.8K.
Judging by the resistance value, it doesn't seem like a malfunction. What's the problem?
PS - Of course, other AD5111s are operating normally when tested by connecting them to the same signal port.
Thanks in advance for your kind reply.
Title errata correction
[edited by: Nun2K at 5:38 AM (GMT -4) on 15 Apr 2022]